Gripper for printing-presses.



H. C. RICHARDSON.

GRI PPER FOR PRINTING PRESSES.

APPLICATION FILED AUG. H. I914- RENEWED DEC. I0, 19!? 7 1 168 675Patented Jan. 18, 1916.

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m I 4 I WITNESSES: E i- IIVI/E/VTOR A TTOHWEV.

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THE coLUn LANOGRAPH w WASHINGTON, D. C

STAS f .aainu r FFlQ, I

WILLIAM c. NOLAND, "or RICHMOND, V RGINIA;

To allwhom c'tmay concern}, p

Be it known that I, I'IENRY C. RIcHARm SON, residing at Richmond, in thecounty of,

Henrico' and State of Virginia, have in: vented certain new and usefulImprovements in Grippers for Printing-Presses, of

which the following is a specification. y

This invention, wh ch relates generally to improvements 111 grippers'i'or printlng presses and the like, in which the cooperating parts aredesigned and combined that both the longitudinal and lateraladjustnients of the gripper may be simultaneously made and the saidparts so constructed that the gripper may be used on narrow edgedmarginsin suchnianner that the gage pins will not interfere with theapplication of the gripper to-the pa per,1nore specifically hasreference to means on that form of gripper device shown in PatentNumben927853, dated Julyl3, 1909. p a

From practical experience with the form of gripper disclosed in thepatent referred to, I have found that while the same is generallyeffective for the purpose for which it is provided,.that under someconditions,

especiallywhen the. paper to be held on'the platen is veryv thin, thatthe paper holding gripper bars, by reason of being so' mounted upon andmovable with the carriageattachment to the oscillatable gripper barithattheir under or contacting surfaces are so projected over. the platen inaplane with the upper surface ofthe platenthat the said bars donotcontact withthe'paper sheet undersufiicient pressure .tohold the sheetin the desired position on the platen during the operation ofprinting.'Again in the constructionof the gripper bar described in thepatentreferredto, the hinged extensions of the gripper or paperholding-barsare.

adapted for only .two adjustments, one in the longitudinal direction ofthe bars and the otherat right angles to .the'said bars.

My invention among other objects has for its purpose to provide, certainimprovedfeatures in the construction of the gripper or paper holdingbars whereby, to provide for causing the said bars, to contact or pressdown upon the sheet to be printed, to posi tively hold, even thethinnestpapersheets in proper position upon the platen during theprinting operation; an improved con- .nection for joining the hingedextensions of snirrnni roe rnINrING-PBEssns.

Specificationof Letters'latent. Patgntefl Jan; is 1916 ApplicationfiledAugust 11, 1914; Serial No. 856,176. aen w d December 10, 1915.Serial no. 66,222. I

' vided to permit foradjusting the extensions to project them topositions other than the straight-aheadand the right angled posi 1 tionshereinbefore referred to. it

With other objects in view that will hereinafter appear, my inventionconsists in the peculiar. construction and novel arrangement. of parts,allof which will be hereinafter fully explained, specifically pointedout in the appended claims andillustrated in the accompanying drawings,inwhichr F lgure 1 s a PBISPGClJDG V16W,Ol my. 1n-

. vention and shows the same as applied for use. 2is a plan view of theprinting press platen and the oscillatable gripper bar with myimprovements applied, the hinged extension of the paper gripper orpressure bar-being shown adjusted diagonally with respect to the body ofthe said pressure bar.

Fig. 3 is a plan yiew of the paper gripper bar, constructed inaccordance with 1 my invention. Fig. 4 is a longitudinal section taken,substantially on. the line 4+4: on Fig.2. I

To render the operation and advantages of my improved. gripper devicereadily understood, I have illustrated, in the drawing,

so much of theplatenof a printing press and the oscillatable gripper,both of the usual construction, as is necessary to show the practicalapplication of my'irnproved gripper bar. a 1 j l In the drawing, 1-represents the oscillatableg'ripper having the usual flangefi andtrunnions2 that ournal n the bracket bear- "ings 3 to,;wliich the platen6, is connected and which has the usual gage pins 7, as

9+9 designate'the gripper or paper holding bars and they, in myconstruction, have a longitudinal slot 11, to form relativelylongitudinal and narrow rod like resilient members 10-10, and they are'slidably held on a carriage 20 by the inturned fingers 20 that form apart of the said carriage, as shown. I I

The carriage 1 20 is slidably mounted on that passes through the slot 4in the bar 1 andthrough the longitudinalslot 11 int-he "the bar 1 and issecured thereon by a bolt 22 carriage to the gripper bar 9 and thepresser said bars during'the printing.

the platen to move smoothly thereover, or in other words to projectfiat-wise over the paper but without a pressure suflicient to positively"prevent the thin paper sheets froinbuckling orslipplng from under theIn my construction, the gripper or presser bars, which are pro ectedfrom the carriage as in the patent referred to, have a portion 90'thereof, preferably the outer end bent down in aplane below the top faceof the carriage "members to which they are 'connected, and-by reason ofsuch construction, a portion of the said presser or gripper bars whenclamped on the carriage to their open ative position, is positively helddown adjacent the platen to produce a positive contacting of the saidbars on the sheet, no mat ter how thin the paper, and under pressuresuflicient to prevent the sheet from slipping from under the bars.

In my construction of the presser or gripper barf), the same has aquadrant shaped recess 9" in the inner edge of the outer end that formsa seat for receiving the semicircular shaped ear l4 formed on. the innerseries of lock apertures 96 in the bar to thereby provide for adjustingthe arm either in thelongitudinal plane of the bar, as is indicatedinFig. 1 at right angles thereto as is shown in Fig. 3 or'projected at anangle of 45 degrees vtothe said bar 9 as is shown in Fig. 2. Byreason'of providing the extension 14 and making it adjustable as stated,should the printing be such that the edge gripping of the papercannot behad and should there be a blank or'open space along the said edge, themember 14 can be swung inwardly at an angle to the bar to engage thesaid sheet, while the said Copies of'this patent may be obtained for Vwhich it appertains.

bar is held away from engagement therewith.

From the foregoing description,xtaken in connection with'theaccompanying drawings, it is thought the complete construction,operation, and advantages of my invention will be clear to those skilledin the art to What I claim is V 1. A gripper for printing pressesconsisting of a bar, a carriage in which the said bar islongitudii'ially adjustable, means for adjustably securing said bar andthe said carriage to the gripper bar of a printing press, an extensionpiece hinged to the free end of the bar, the said bar extending beyondthe hinged joint and having a plurality' of latch recesses and aspringjlatch carried by the said extension piece having a lug to. entereither of the said recesses to hold said extension piece in any of itsdifi'erent adjustments. K

2.v In a printing press, the combination with the platen and anoscillatab'le gripper bar that cooperates with the said platen; ofagripper, a-carriage longitudinally slidable on said gripper bar, thesaid gripper comprising a flat member and projected from thecarriage tolie fiat-wise over the platen and'a single ,means foradjustably securingsaid gripper member and the carriage to the gripper bar, that portion ofthe gripper member that moves over the platen being bent in two planes,one of which is below the top face of the carriage to which the memberis secured.

3. A gripper for printing presses consisting of abar, a carriage onwhich the said 'bar' is longitudinallyadjustable, means for adjustablysecuring the said bar and the said carriage to the gripper bar of a,printing press, the outer end of the said bar having a quadrant shapedrecess on the'inner edge thereof, an extensionthat includes a semi-.circular shaped ear having a shouldered portion that forms a: stopforengaging the f outer edge of the gripper bar to hold the ex} tensionswung up lengthwise of the said bar, the said semi-circular shaped earof the extension being pivotally mounted in the aforesaid recessof thebar, said bar having a plurality of latch recesses and a spring latchcarried by the extension and having a lugfor engaging either of thelatch recesses for holding the extension piece in any of its differentadjustments. 7 r p a HENRY C. RICHARDSON. VVitness'esi j V IsaAo DIGGS,LUCY E. HoGAN.

five cents each, by addressing the Commissioner 1' Patents:

Washington, D. C. a i

